chart2/source/view/main/PolarLabelPositionHelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "PolarLabelPositionHelper.hxx"
  21 #include "PlottingPositionHelper.hxx"
  22 #include "CommonConverters.hxx"
  23 #include <basegfx/vector/b2dvector.hxx>
  24 #include <basegfx/vector/b2ivector.hxx>
  25
  26 #include <com/sun/star/chart/DataLabelPlacement.hpp>
  27
  28 namespace chart
  29 {
  30 using namespace ::com::sun::star;
  31 using namespace ::com::sun::star::chart2;
  32
  33 PolarLabelPositionHelper::PolarLabelPositionHelper(
  34                     PolarPlottingPositionHelper* pPosHelper
  35                     , sal_Int32 nDimensionCount
  36                     , const uno::Reference< drawing::XShapes >& xLogicTarget
  37                     , AbstractShapeFactory* pShapeFactory )
  38                     : LabelPositionHelper( pPosHelper, nDimensionCount, xLogicTarget, pShapeFactory )
  39                     , m_pPosHelper(pPosHelper)
  40 {
  41 }
  42
  43 PolarLabelPositionHelper::~PolarLabelPositionHelper()
  44 {
  45 }
  46
  47 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForLogicValues(
  48         LabelAlignment& rAlignment
  49         , double fLogicValueOnAngleAxis
  50         , double fLogicValueOnRadiusAxis
  51         , double fLogicZ
  52         , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
  53 {
  54     double fUnitCircleAngleDegree = m_pPosHelper->transformToAngleDegree( fLogicValueOnAngleAxis );
  55     double fUnitCircleRadius = m_pPosHelper->transformToRadius( fLogicValueOnRadiusAxis );
  56
  57     return getLabelScreenPositionAndAlignmentForUnitCircleValues(
  58            rAlignment, ::com::sun::star::chart::DataLabelPlacement::OUTSIDE
  59            , fUnitCircleAngleDegree, 0.0
  60            , fUnitCircleRadius, fUnitCircleRadius, fLogicZ, nScreenValueOffsetInRadiusDirection );
  61 }
  62
  63 awt::Point PolarLabelPositionHelper::getLabelScreenPositionAndAlignmentForUnitCircleValues(
  64         LabelAlignment& rAlignment, sal_Int32 nLabelPlacement
  65         , double fUnitCircleStartAngleDegree, double fUnitCircleWidthAngleDegree
  66         , double fUnitCircleInnerRadius, double fUnitCircleOuterRadius
  67         , double fLogicZ
  68         , sal_Int32 nScreenValueOffsetInRadiusDirection ) const
  69 {
  70     bool bCenter = (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
  71                 && (nLabelPlacement != ::com::sun::star::chart::DataLabelPlacement::INSIDE);
  72
  73     double fAngleDegree = fUnitCircleStartAngleDegree + fUnitCircleWidthAngleDegree/2.0;
  74     double fRadius = 0.0;
  75     if( !bCenter ) //e.g. for pure pie chart(one ring only) or for angle axis of polyar coordinate system
  76         fRadius = fUnitCircleOuterRadius;
  77     else
  78         fRadius = fUnitCircleInnerRadius + (fUnitCircleOuterRadius-fUnitCircleInnerRadius)/2.0 ;
  79
  80     awt::Point aRet( this->transformSceneToScreenPosition(
  81         m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ+0.5 ) ) );
  82
  83     if(3==m_nDimensionCount && nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE)
  84     {
  85         //check whether the upper or the downer edge is more distant from the center
  86         //take the farest point to put the label to
  87
  88         awt::Point aP0( this->transformSceneToScreenPosition(
  89             m_pPosHelper->transformUnitCircleToScene( 0, 0, fLogicZ ) ) );
  90         awt::Point aP1(aRet);
  91         awt::Point aP2( this->transformSceneToScreenPosition(
  92             m_pPosHelper->transformUnitCircleToScene( fAngleDegree, fRadius, fLogicZ-0.5 ) ) );
  93
  94         ::basegfx::B2DVector aV0( aP0.X, aP0.Y );
  95         ::basegfx::B2DVector aV1( aP1.X, aP1.Y );
  96         ::basegfx::B2DVector aV2( aP2.X, aP2.Y );
  97
  98         double fL1 = ::basegfx::B2DVector(aV1-aV0).getLength();
  99         double fL2 = ::basegfx::B2DVector(aV2-aV0).getLength();
 100
 101         if(fL2>fL1)
 102             aRet = aP2;
 103
 104         //calculate new angle for alignment
 105         double fDX = aRet.X-aP0.X;
 106         double fDY = aRet.Y-aP0.Y;
 107         fDY*=-1.0;//drawing layer has inverse y values
 108         if( fDX != 0.0 )
 109         {
 110             fAngleDegree = atan(fDY/fDX)*180.0/F_PI;
 111             if(fDX<0.0)
 112                 fAngleDegree+=180.0;
 113         }
 114         else
 115         {
 116             if(fDY>0.0)
 117                 fAngleDegree = 90.0;
 118             else
 119                 fAngleDegree = 270.0;
 120         }
 121     }
 122     //set LabelAlignment
 123     if( !bCenter )
 124     {
 125         while(fAngleDegree>360.0)
 126             fAngleDegree-=360.0;
 127         while(fAngleDegree<0.0)
 128             fAngleDegree+=360.0;
 129
 130         bool bOutside = nLabelPlacement == ::com::sun::star::chart::DataLabelPlacement::OUTSIDE;
 131
 132         if(fAngleDegree==0.0)
 133             rAlignment = LABEL_ALIGN_CENTER;
 134         else if(fAngleDegree<=22.5)
 135             rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
 136         else if(fAngleDegree<67.5)
 137             rAlignment = bOutside ? LABEL_ALIGN_RIGHT_TOP : LABEL_ALIGN_LEFT_BOTTOM;
 138         else if(fAngleDegree<112.5)
 139             rAlignment = bOutside ? LABEL_ALIGN_TOP : LABEL_ALIGN_BOTTOM;
 140         else if(fAngleDegree<=157.5)
 141             rAlignment = bOutside ? LABEL_ALIGN_LEFT_TOP : LABEL_ALIGN_RIGHT_BOTTOM;
 142         else if(fAngleDegree<=202.5)
 143             rAlignment = bOutside ? LABEL_ALIGN_LEFT : LABEL_ALIGN_RIGHT;
 144         else if(fAngleDegree<247.5)
 145             rAlignment = bOutside ? LABEL_ALIGN_LEFT_BOTTOM : LABEL_ALIGN_RIGHT_TOP;
 146         else if(fAngleDegree<292.5)
 147             rAlignment = bOutside ? LABEL_ALIGN_BOTTOM : LABEL_ALIGN_TOP;
 148         else if(fAngleDegree<337.5)
 149             rAlignment = bOutside ? LABEL_ALIGN_RIGHT_BOTTOM : LABEL_ALIGN_LEFT_TOP;
 150         else
 151             rAlignment = bOutside ? LABEL_ALIGN_RIGHT : LABEL_ALIGN_LEFT;
 152     }
 153     else
 154     {
 155         rAlignment = LABEL_ALIGN_CENTER;
 156     }
 157
 158     //add a scaling independent Offset if requested
 159     if( nScreenValueOffsetInRadiusDirection != 0)
 160     {
 161         awt::Point aOrigin( this->transformSceneToScreenPosition(
 162             m_pPosHelper->transformUnitCircleToScene( 0.0, 0.0, fLogicZ+0.5 ) ) );
 163         basegfx::B2IVector aDirection( aRet.X- aOrigin.X, aRet.Y- aOrigin.Y );
 164         aDirection.setLength(nScreenValueOffsetInRadiusDirection);
 165         aRet.X += aDirection.getX();
 166         aRet.Y += aDirection.getY();
 167     }
 168
 169     return aRet;
 170 }
 171
 172 } //namespace chart
 173
 174 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */